AC has no fixed ground, to goes both ways like a hermaphrodite.
The rectifier makes it non hermaphrodite just male + & female- AKA DC power goes one way.
AC/hermaphrodite goes both ways.
So the winding tang was just an AC/hermaphrodite wire connected to the stater frame.
So Ryan now has both high power AC/hermaphrodite leads connected to the regulator/rectifier for two phase rectification AKA 12volt DC. (edited)